Chiral Brønsted-Acid-Catalyzed Asymmetric Oxidation of Sulfenamide by Using H<sub>2</sub>O<sub>2</sub>: A Versatile Access to Sulfinamide and Sulfoxide with High Enantioselectivity
Herein, we describe an example of catalyticasymmetricsynthesis of sulfinamides. Aromatic sulfenamides were chosen as useful substrates, because of the indispensable N–H bond, which could form an efficient hydrogen bond with chiral phosphoric acid. H2O2 (35%) was used as the terminal oxidant for preparation of sulfinamides in high yields and enantioselectivities, which could be easily derivatized
在本文中,我们描述了亚磺酰胺催化不对称合成的一个例子。选择芳香亚磺酰胺作为有用的底物,因为它不可缺少的NH键可以与手性磷酸形成有效的氢键。H 2 O 2(35%)被用作末端氧化剂,以高收率和对映选择性制备亚磺酰胺,可以很容易地衍生为亚砜和其他亚磺酰胺,而不会损失对映选择性。
アミン立体異性体の製造方法
申请人:アプシンターム・リミテッド・ライアビリティ・カンパニー
公开号:JP2005522525A
公开(公告)日:2005-07-28
According to the present invention, a sulfinyl imine having an alcohol, thiol or amine residue on a sulfinyl group is stereoselectively reduced, or a sulfinyl imine stereoisomer having an alcohol, thiol or amine residue on a sulfinyl group is nucleophilic. Reacting with an atomic source to provide a sulfinylamine stereoisomer, and then contacting the sulfinylamine stereoisomer with a reagent suitable for cleavage of a sulfur-nitrogen bond to provide the amine stereoisomer. A method for producing amine stereoisomers is provided. The present invention also provides methods for using some of the above intermediates in the preparation of novel intermediates, sulfoxide and sulfinylamine stereoisomers useful in the above methods.
Practical and highly stereoselective technology for preparation of enantiopure sulfoxides and sulfinamides utilizing activated and functionally differentiated N-sulfonyl-1,2,3-oxathiazolidine-2-oxide derivatives
作者:Zhengxu Han、Dhileepkumar Krishnamurthy、Paul Grover、Q. Kevin Fang、Xiping Su、H. Scott Wilkinson、Zhi-Hui Lu、Daniel Magiera、Chris H. Senanayake
DOI:10.1016/j.tet.2005.03.122
日期:2005.6
A simple, general, and practical technology to prepare enantiopure 1,2,3-oxathiazolidine-2-oxide derivatives using chiral aryl N-sulfonyl aminoalcohol derivatives and thionyl chloride is reported. The versatility of these novel chiral building blocks (MIOO and TMPOO), was exemplified by the expedient production of a variety of unique chiral sulfoxides and valuable chiral sulfinamides in excellent yields
The invention relates to benzoxazines useful as inhibitors of ion channels. The invention also provides pharmaceutically acceptable compositions comprising the compounds of the invention and methods of using the compositions in the treatment of various disorders.
New General Sulfinylating Process for Asymmetric Synthesis of Enantiopure Sulfinates and Sulfoxides
作者:Bruce Z. Lu、Fuqiang Jin、Yongda Zhang、Xinhe Wu、Stephen A. Wald、Chris H. Senanayake
DOI:10.1021/ol0501020
日期:2005.4.14
[GRAPHICS]A general process for the efficient synthesis of sulfinyl transfer agents has been developed using cinchona alkaloids quinine and quinidine as chiral auxiliaries. The importance of these new and unique sulfinyl transfer agents is exemplified by the expedient synthesis of several sulfoxides in excellent enantiopurities and high yields.